Upgrade your dirt bike’s carburetion with a jet kit designed for PWK, Keihin, CVK, OKO, and similar carburetors. This guide highlights five compatible jet kits that cover main jets and slow pilot jets, helping you dial in air-fuel delivery for better throttle response, easier starting, and more consistent power across RPM ranges. Each option is crafted from brass with CNC-precise sizing to fit a wide range of pit bikes, ATVs, go-karts, and dirt bikes. Read on to compare compatibility, included jets, and practical benefits for your ride.
| Product | Brand | Key Specs | Link |
|---|---|---|---|
| 40PCS Carburetor Main Jet Slow Pilot Jet Kit for PWK Keihin OKO CVK Crab | Unknown | 30 Main Jets · 10 Pilot Jets · Brass, CNC | View Product |
| 40PCS Carburetor Main Jet Slow Pilot Jet Kit for Keihin PE PWK CVK OKO KOSO | XIKOBY Store | 30 Main Jets · 10 Pilot Jets · Broad compatibility | View Product |
| YAMAKATO Aftermarket 22pcs Carburetor Jet Kit | YAMAKATO Store | 11 Main · 11 Pilot · Brass | View Product |
| YAMAKATO Aftermarket 33pcs Carburetor Jet Kit | YAMAKATO Store | 22 Main · 11 Pilot · Brass | View Product |
| Carburetor Main Jet Slow Pilot Jet Kit Suitable for PWK Keihin OKO CVK Crab | Unknown | 30 Main Jets · 10 Pilot Jets | View Product |
40PCS Jet Kit For PWK Keihin OKO CVK Dirt Bike
This 40-piece kit provides a balanced mix of 30 main jets and 10 slow pilot jets, designed for PWK and Keihin family carbs as well as OKO and Koso variants. Brass construction ensures durability and reliable corrosion resistance, while CNC manufacturing guarantees precise sizing for consistent fuel metering. Suitable for a broad array of stage-6, Polini, and other aftermarket carbs, it supports tuning across various displacement engines in dirt bikes and ATVs. The included slow jets (sizes 32–55) enable finer idle and mid-range adjustments, allowing riders to dial in response for different altitude and temperature conditions.
40PCS Main & Pilot Jet Kit For Keihin/PE/PWK/OKO
This kit is designed for broad compatibility with PE, PWK, CVK, OKO, KOSO, and Polini carburetors, including many PWK and Keihin variants as well as CVK and CVK-like models. It includes a comprehensive assortment of jets that fit many 110cc to 300cc dirt bikes, as well as GY6 scooters and ATVs. Brass construction provides durability and rust resistance, while CNC machining ensures smooth edges and precise hole diameters for predictable fuel flow. The package is particularly useful for riders who swap between machines or rebuild carburetors after maintenance or performance upgrades.
YAMAKATO 22pcs Carburetor Jet Kit
With 11 main jets and 11 pilot jets, this kit targets PWK, CVK, PE, OKO, KOSO, Stage-6, and Polini carburetors. The brass construction resists rust and heat, and CNC sizing ensures precise jet diameters for accurate air-fuel mixture tuning. A good choice for riders seeking a compact but versatile jet kit to cover multiple carburetor families on 125cc-300cc dirt bikes, go-karts, and ATVs. Always compare to your stock jets to verify fitment before installing.
YAMAKATO 33pcs Jet Kit For PWK/Keihin/OKO
This larger kit offers 22 main jets and 11 pilot jets crafted from CNC-machined brass. It targets a wide range of carburetor models, including PWK, Keihin, OKO, CVK, KOSO, and Polini variants, and is suitable for many Chinese pit bikes and ATVs with carburetors in the 125cc–250cc range. The assortment enables substantial tuning flexibility across cold start, mid-range, and wide-open throttle conditions. As with all jet kits, verify model compatibility with your carburetor before usage.
Carburetor Main Jet Slow Pilot Jet Kit For PWK/Keihin/OKO
This 40-piece kit includes 30 main jets and 10 slow pilot jets, with 32–55 sizing for pilots and a range of main jets (100–140). Brass construction and CNC machining emphasize durability and precise tolerances. It is marketed for PWK, CVK, OKO, KOSO, Stage-6, and other carburetor types, making it a practical all-rounder for riders who tune for different conditions or engines around 125cc up to 300cc. The kit aids in optimizing idle behavior, mid-range response, and top-end power delivery when paired with compatible carbs.
Buying Guide: Key Considerations For Choosing A Dirt Bike Jet Kit
When selecting a jet kit, consider compatibility with your carburetor family (PWK, Keihin, CVK, OKO, KOSO, Polini) and engine displacement. Verify jet sizes for both mains and pilots to match your altitude and temperature, and ensure the brass CNC-machined jets provide consistent sizing and corrosion resistance. A larger kit can be more versatile for multi-bike setups or frequent tuning, while smaller kits may be more economical for a single bike. Durability, ease of installation, and clear labeling of jet sizes help reduce setup time. If you use aftermarket exhausts or perform engine modifications, prioritize jets that cover a broad size range and have a proven fit for your carb type. In practice, start with mid-range jets and adjust in small steps to avoid sudden changes in air-fuel balance. Compare stock jet sizes to the kit contents and note any model-specific fit notes from the seller. For riders who race or ride in varied conditions, a kit with both main and pilot jets across a wide size range offers the best flexibility for reliable starting and throttle response.
In selecting between options, consider the range of supported carburetors and whether the kit’s included jets cover your preferred models. Some kits explicitly state compatibility with widely used brands and models, providing confidence that you can tune without purchasing additional jets. For budget-conscious buyers, a kit with a balanced mix of mains and pilots across several sizes is often more cost-effective than buying individual jets piecemeal. Finally, read user reviews focusing on fitment and durability, as real-world feedback can highlight subtleties like thread pitch or jet hole diameter that aren’t obvious from the product description.